Thank you all for replying. I have to admit, I was hoping for some happy ending stories.. but life is life.
My sister's children are pretty much adults, so I don't have that to look for.
I am.. sad. Very sad.
As I mentioned earlier, it's not something I ever thought of before. And having it crash on me like that is pretty harsh. Apart from everything, I am under ridiculous pressure from my parents to have babies. Mind, they don't believe in mental illness, which makes things somewhat difficult.
Anyhow, it hurts. It f**ng hurts.